Log warning on entity extraction failure instead of silently swallowing

src/selectools/entity_memory.py

@@ -8,6 +8,7 @@
 from __future__ import annotations
 
 import json
+import logging
 import re
 import threading
 import time
@@ -17,6 +18,8 @@
 from .stability import stable
 from .types import Message, Role
 
+logger = logging.getLogger(__name__)
+
 
 @stable
 @dataclass
@@ -173,6 +176,7 @@ def extract_entities(
                 )
             return extracted
         except Exception:
+            logger.warning("Entity extraction failed", exc_info=True)
             return []
 
     def update(self, entities: List[Entity]) -> None:

tests/test_entity_memory.py

@@ -132,6 +132,15 @@ def test_invalid_json_returns_empty(self) -> None:
         result = em.extract_entities([Message(role=Role.USER, content="test")])
         assert result == []
 
+    def test_provider_failure_logs_warning(self, caplog) -> None:
+        import logging as _logging
+
+        em = EntityMemory(provider=FailingProvider())
+        with caplog.at_level(_logging.WARNING, logger="selectools.entity_memory"):
+            result = em.extract_entities([Message(role=Role.USER, content="test")])
+        assert result == []
+        assert "Entity extraction failed" in caplog.text
+
     def test_respects_relevance_window(self) -> None:
         entities_json = json.dumps([{"name": "X", "entity_type": "concept"}])
         provider = FakeExtractionProvider(entities_json)